ch21-The_Linux_System
... specify processes to the operating system when an application makes a system call to signal, modify, or wait for another process Credentials. Each process must have an associated user ID and one or more group IDs that determine the process’s rights to access system resources and files Personalit ...
... specify processes to the operating system when an application makes a system call to signal, modify, or wait for another process Credentials. Each process must have an associated user ID and one or more group IDs that determine the process’s rights to access system resources and files Personalit ...
[slides] Case study: Linux
... 1. Normal kernel code is nonpreemptible (until 2.4) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed and control is about to be returned to user mo ...
... 1. Normal kernel code is nonpreemptible (until 2.4) – when a time interrupt is received while a process is executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed and control is about to be returned to user mo ...
No Slide Title
... The environment-variable mechanism provides a customization of the operating system that can be set on a per-process basis, rather than being configured for the system as a whole. ...
... The environment-variable mechanism provides a customization of the operating system that can be set on a per-process basis, rather than being configured for the system as a whole. ...
The Linux System 21.2 Silberschatz, Galvin and Gagne ©2009
... The environment-variable mechanism provides a customization of the operating system that can be set on a per-process basis, rather than being configured for the system as a whole. ...
... The environment-variable mechanism provides a customization of the operating system that can be set on a per-process basis, rather than being configured for the system as a whole. ...
The Linux System
... processes and provides interprocess communication To look at memory management in Linux To explore how Linux implements file systems and manages I/O devices ...
... processes and provides interprocess communication To look at memory management in Linux To explore how Linux implements file systems and manages I/O devices ...
Construction of a Highly Dependable Operating System,
... to enable, disable, and manage interrupts on the devices they control. From inside the kernel, doing this is easy; from user mode it is impossible without help. Class 5 dependencies arise because system shutdown is a peculiar business, with various idiosyncracies. Drivers play a role here shutting d ...
... to enable, disable, and manage interrupts on the devices they control. From inside the kernel, doing this is easy; from user mode it is impossible without help. Class 5 dependencies arise because system shutdown is a peculiar business, with various idiosyncracies. Drivers play a role here shutting d ...
ppt
... To look at memory management in Linux To explore how Linux implements file systems and manages ...
... To look at memory management in Linux To explore how Linux implements file systems and manages ...
Assignment C
... Debian Testing. It is available in both 32 and 64-bit as a live DVD with a Cinnamon or MATE desktop. The purpose of LMDE is to look identical to the main Linux Mint edition and to provide the same functionality while using Debian as a base. Maemo A development platform for hand held devices such as ...
... Debian Testing. It is available in both 32 and 64-bit as a live DVD with a Cinnamon or MATE desktop. The purpose of LMDE is to look identical to the main Linux Mint edition and to provide the same functionality while using Debian as a base. Maemo A development platform for hand held devices such as ...
A user-mode port of the Linux kernel
... the process at the beginning of the system call switch. This context is constructed by the process, just after its creation, calling the switch procedure and sending itself a SIGSTOP. The tracing thread sees the SIGSTOP and saves the process register and stack state in the task structure. When this ...
... the process at the beginning of the system call switch. This context is constructed by the process, just after its creation, calling the switch procedure and sending itself a SIGSTOP. The tracing thread sees the SIGSTOP and saves the process register and stack state in the task structure. When this ...
C Programming under Linux
... pioneering spirit of cooperation existed – thus Richard Stallman was able to establish the GNU (Gnu’s Not Unix) software project in 1983, which developed free programs mainly for unix machines. However as computer hardware got cheaper and better even lowly PCs were capable of running unix-like syste ...
... pioneering spirit of cooperation existed – thus Richard Stallman was able to establish the GNU (Gnu’s Not Unix) software project in 1983, which developed free programs mainly for unix machines. However as computer hardware got cheaper and better even lowly PCs were capable of running unix-like syste ...
CS 5204 Operating Systems Fall 2005
... – A JVM that provides an OS-like environment for Java applications. The so enriched JVM can run on top of any OS. • J-Kernel, MVM, KaffeOS CS 5204 Fall 2013 ...
... – A JVM that provides an OS-like environment for Java applications. The so enriched JVM can run on top of any OS. • J-Kernel, MVM, KaffeOS CS 5204 Fall 2013 ...
Kernel - Duke University
... of execution within the same address space. – Create a context for a new thread with makecontext. – Modify saved contexts at will. – Context switch with swapcontext: transfer a core from one thread to another (“change drivers”) ...
... of execution within the same address space. – Create a context for a new thread with makecontext. – Modify saved contexts at will. – Context switch with swapcontext: transfer a core from one thread to another (“change drivers”) ...
Commercial Real-Time Operating Systems
... 1.3. Genesis of POSIX Before we discuss the different features of the POSIX standard in the next subsection, let us understand the historical developments that led to the development of POSIX. Unix was originally developed by AT&T Bell Labs. Since AT&T was primarily a telecommunication company, it f ...
... 1.3. Genesis of POSIX Before we discuss the different features of the POSIX standard in the next subsection, let us understand the historical developments that led to the development of POSIX. Unix was originally developed by AT&T Bell Labs. Since AT&T was primarily a telecommunication company, it f ...
Kernel (computer science)
... the computer, which are controlled by the kernel through device drivers. For example, to show the user something on the screen, an application would make a request to the kernel, which would forward the request to its display driver, which is then responsible for actually plotting the character/pixe ...
... the computer, which are controlled by the kernel through device drivers. For example, to show the user something on the screen, an application would make a request to the kernel, which would forward the request to its display driver, which is then responsible for actually plotting the character/pixe ...
Linux+ Guide to Linux Certification
... simple utilities or commands that can be combined to perform powerful functions a permanent hierarchical file system simple interface to connect the OS to devices using a consistent file format ...
... simple utilities or commands that can be combined to perform powerful functions a permanent hierarchical file system simple interface to connect the OS to devices using a consistent file format ...
Operating system structures
... systems) can share the same hardware Protect from each other Some sharing of file can be permitted, controlled Commutate with each other, other physical systems via networking ...
... systems) can share the same hardware Protect from each other Some sharing of file can be permitted, controlled Commutate with each other, other physical systems via networking ...
Operating system structures
... systems) can share the same hardware Protect from each other Some sharing of file can be permitted, controlled Commutate with each other, other physical systems via networking ...
... systems) can share the same hardware Protect from each other Some sharing of file can be permitted, controlled Commutate with each other, other physical systems via networking ...
PowerPoint Format
... Linux is a modem, free operating system based on UNIX standards. First developed as a small but self-contained kernel in 1991 by Linus Torvalds, with the major design goal of UNIX compatibility. Its history has been one of collaboration by many users from all around the world, corresponding almost e ...
... Linux is a modem, free operating system based on UNIX standards. First developed as a small but self-contained kernel in 1991 by Linus Torvalds, with the major design goal of UNIX compatibility. Its history has been one of collaboration by many users from all around the world, corresponding almost e ...
The BaBar Online Detector Control System Update
... VxWorks like shell with loadable module support and C like regular expression language ...
... VxWorks like shell with loadable module support and C like regular expression language ...
Embedded Linux Design and Programming
... Kernel Modules System Call – Explicit request to the kernel made through a software interrupt. Service provided in the kernel, cross the user-space / kernel ...
... Kernel Modules System Call – Explicit request to the kernel made through a software interrupt. Service provided in the kernel, cross the user-space / kernel ...
The 27 Year Old Microkernel - foundry27
... > Arguments are a function pointer and a data pointer Remember process manager shares address space with kernel > _NTO_PF_RING0 flag needed to use this kernel call > Only process manager has this flag set ...
... > Arguments are a function pointer and a data pointer Remember process manager shares address space with kernel > _NTO_PF_RING0 flag needed to use this kernel call > Only process manager has this flag set ...
Errors and Exception Handling
... Two machines: test and development Communicate over gdb through serial port Many systems companies have some form of this infrastructure ...
... Two machines: test and development Communicate over gdb through serial port Many systems companies have some form of this infrastructure ...
Linux kernel
The Linux kernel is a Unix-like computer operating system kernel. It is widely used world-wide; the Linux operating system is based on it and deployed on both traditional computer systems such as personal computers and servers, usually in the form of Linux distributions, and on various embedded devices such as routers and NAS appliances. The Android operating system for tablet computers, smartphones and smartwatches is also based atop the Linux kernel.The Linux kernel was initially conceived and created in 1991 by Finnish computer science student Linus Torvalds, for his personal computer and with no cross-platform intentions, but has since expanded to support a huge array of computer architectures, many more than other operating systems or kernels. Linux rapidly attracted developers and users who adapted code from other free software projects for use with the new operating system. The Linux kernel has received contributions from nearly 12,000 programmers from more than 1,200 companies, including some of the largest software and hardware vendors.The Linux kernel API, the application programming interface (API) through which user programs interact with the kernel, is meant to be very stable and to not break userspace programs (some programs, such as those with GUIs, rely on other APIs as well). As part of the kernel's functionality, device drivers control the hardware; ""mainlined"" device drivers are also meant to be very stable. However, the interface between the kernel and loadable kernel modules (LKMs), unlike in many other kernels and operating systems, is not meant to be very stable by design.The Linux kernel, developed by contributors worldwide, is a prominent example of free and open source software. Day-to-day development discussions take place on the Linux kernel mailing list (LKML). The Linux kernel is released under the GNU General Public License version 2 (GPLv2), with some firmware images released under various non-free licenses.